@article{GDZPPN001258117, title = {On the defect theorem and simpliflability.}, journal = {Semigroup forum}, volume = {33}, year = {1986}, pages = {199-218}, zbl = {0621.20033}, url = {http://dml.mathdoc.fr/item/GDZPPN001258117} }
Harju, T.; Karhumäki, J. On the defect theorem and simpliflability.. Semigroup forum, Tome 33 (1986) pp. 199-218. http://gdmltest.u-ga.fr/item/GDZPPN001258117/